Micrel, Inc.

SY88973BL

February 2007

3

M9999-020207-A

hbwhelp@micrel.com or (408) 955-1690

Pin Configuration

16-pin QFN

Pin Description

Pin Number

(QFN)

Pin Name

Type

Pin Function

15

/EN

TTL Input: Default

is high.

Enable: De-asserts true data output when high. Incorporates 25k

Ω pull-up to

VCC.

1, 4

DIN, /DIN

Differential Data

Input

Differential data input. Each pin internally terminates to REF through 50

Ω.

6

REF

Reference Voltage: Bypass with 0.01µF low ESR capacitor from REF to VCC

to stabilize LOSLVL and REF.

14

LOSLVL

Input: Default is

maximum

sensitivity

Loss-of-Signal Level Set: A resistor from this pin to VCC sets the threshold for

the data input amplitude at which the LOS output will be asserted.

2, 3, 10, 11

Exposed Pad

GND

Ground

Device ground. Exposed pad must be soldered (or equivalent) to the same

potential as the ground pins.

7

LOS

Open Collector TTL

Output

Loss-of-Signal: asserts high when the data input amplitude falls below the

threshold set by LOSLVL. For proper operation, connect an external 4.75k

Ω

to 10k

Ω pull-up resistor between this pin and Vcc.

9, 12

DOUT,

/DOUT

Differential CML

Output

Differential data output.

5, 8, 13, 16

VCC

Power Supply

Positive power supply. Bypass with 0.1µF|| 0.01µF low ESR capacitors.

0.01µF capacitors should be as close as possible to VCC pins.